/Engine/Plugins/Runtime/MassGameplay/Source/MassActors/Public/MassActorSpawnerSubsystem.h
Removes a spawn request The only time a spawn request cannot be removed is when its state is processing Also spawn requests are auto removed if you provided a spawn delegate after it was being executed.
true if successfully removed the request
bool RemoveActorSpawnRequest ( [FMassActorSpawnRequestHandle](API\Plugins\MassActors\FMassActorSpawnRequestHandle) & SpawnRequestHandle )